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-rw-r--r--include/linux/reiserfs_fs.h42
1 files changed, 7 insertions, 35 deletions
diff --git a/include/linux/reiserfs_fs.h b/include/linux/reiserfs_fs.h
index d445b682ce0..32148625fc2 100644
--- a/include/linux/reiserfs_fs.h
+++ b/include/linux/reiserfs_fs.h
@@ -381,57 +381,29 @@ struct offset_v1 {
381} __attribute__ ((__packed__)); 381} __attribute__ ((__packed__));
382 382
383struct offset_v2 { 383struct offset_v2 {
384#ifdef __LITTLE_ENDIAN 384 __le64 v;
385 /* little endian version */
386 __u64 k_offset:60;
387 __u64 k_type: 4;
388#else
389 /* big endian version */
390 __u64 k_type: 4;
391 __u64 k_offset:60;
392#endif
393} __attribute__ ((__packed__)); 385} __attribute__ ((__packed__));
394 386
395#ifndef __LITTLE_ENDIAN
396typedef union {
397 struct offset_v2 offset_v2;
398 __u64 linear;
399} __attribute__ ((__packed__)) offset_v2_esafe_overlay;
400
401static inline __u16 offset_v2_k_type( const struct offset_v2 *v2 ) 387static inline __u16 offset_v2_k_type( const struct offset_v2 *v2 )
402{ 388{
403 offset_v2_esafe_overlay tmp = *(const offset_v2_esafe_overlay *)v2; 389 __u8 type = le64_to_cpu(v2->v) >> 60;
404 tmp.linear = le64_to_cpu( tmp.linear ); 390 return (type <= TYPE_MAXTYPE)?type:TYPE_ANY;
405 return (tmp.offset_v2.k_type <= TYPE_MAXTYPE)?tmp.offset_v2.k_type:TYPE_ANY;
406} 391}
407 392
408static inline void set_offset_v2_k_type( struct offset_v2 *v2, int type ) 393static inline void set_offset_v2_k_type( struct offset_v2 *v2, int type )
409{ 394{
410 offset_v2_esafe_overlay *tmp = (offset_v2_esafe_overlay *)v2; 395 v2->v = (v2->v & cpu_to_le64(~0ULL>>4)) | cpu_to_le64((__u64)type<<60);
411 tmp->linear = le64_to_cpu(tmp->linear);
412 tmp->offset_v2.k_type = type;
413 tmp->linear = cpu_to_le64(tmp->linear);
414} 396}
415 397
416static inline loff_t offset_v2_k_offset( const struct offset_v2 *v2 ) 398static inline loff_t offset_v2_k_offset( const struct offset_v2 *v2 )
417{ 399{
418 offset_v2_esafe_overlay tmp = *(const offset_v2_esafe_overlay *)v2; 400 return le64_to_cpu(v2->v) & (~0ULL>>4);
419 tmp.linear = le64_to_cpu( tmp.linear );
420 return tmp.offset_v2.k_offset;
421} 401}
422 402
423static inline void set_offset_v2_k_offset( struct offset_v2 *v2, loff_t offset ){ 403static inline void set_offset_v2_k_offset( struct offset_v2 *v2, loff_t offset ){
424 offset_v2_esafe_overlay *tmp = (offset_v2_esafe_overlay *)v2; 404 offset &= (~0ULL>>4);
425 tmp->linear = le64_to_cpu(tmp->linear); 405 v2->v = (v2->v & cpu_to_le64(15ULL<<60)) | cpu_to_le64(offset);
426 tmp->offset_v2.k_offset = offset;
427 tmp->linear = cpu_to_le64(tmp->linear);
428} 406}
429#else
430# define offset_v2_k_type(v2) ((v2)->k_type)
431# define set_offset_v2_k_type(v2,val) (offset_v2_k_type(v2) = (val))
432# define offset_v2_k_offset(v2) ((v2)->k_offset)
433# define set_offset_v2_k_offset(v2,val) (offset_v2_k_offset(v2) = (val))
434#endif
435 407
436/* Key of an item determines its location in the S+tree, and 408/* Key of an item determines its location in the S+tree, and
437 is composed of 4 components */ 409 is composed of 4 components */